Bay Area Community Exchange (BACE) Timebank. A local community timebank. For every hour you spend doing something for someone in your community, you earn one hour to have someone do something for you. It is an alternative way to give and receive resources. timebankinfo@sfbace.org; timebank.sfbace.org

Bike Kitchen­. Volunteer-run, do-it-yourself bicycle resource providing all the expertise, tools, and parts you need to fix or build a bicycle. We also provide classes, have youth programs, encourage reuse & recycling, and work with community groups to get more people on bicycles. 650H Florida Street, San Francisco, 94110; (415) 647-2453; www.bikekitchen.org

City Art Gallery. A gallery, run and maintained by about 200 local ­artists. Provides gallery space, shows and sells art from independent local artists.828 Valencia St., San Francisco, 94110; (415) 970-9900; www.cityartgallery.org

Maybeck High School. Small, staff-run high school in Berkeley which offers a unique opportunity for students to engage with an academically challenging college-prep curriculum in a collaborative rather than competitive environment. 2727 College Avenue, Berkeley, 94705; (510) 841-8489; www.maybeckhs.org

Missing Link Bicycle Cooperative. A bike shop which sells new bicycles, used bikes, parts, accessories, and clothing. Missing Link also repairs bikes at their Repair Annex, across the street from the main store. 1988 Shattuck Avenue, Berkeley, 94704; (510) 843-7471; www.missinglink.org.

Modern Times Bookstore. A progressive resource for the Bay Area, a neighborhood bookstore for the Mission. 2919 24th Street­­, San Francisco, 94110; (415) 282-9246; www.mtbs.com